Electromagnetic Induction

The arm PQ of a rectangular conductor is moving from x = 0 to x = 2b outwards and then inwards from x = 2b to x = 0 as shown in the figure. A uniform magnetic field perpendicular to the plane is acting from x = 0 to x = b. Identify the graph the variation of different quantities with distance.

An object of mass 'm' is being moved with a constant velocity under the actin of an applied force of 2N along a frictionless surface with following surface profile.

The correct applied force vs distance graph will be:

 

 

A square loop of side 20 cm and resistance  is moved towards right with a constant speed v₀. The right arm of the loop is in a uniform magnetic field of 5T. The field is perpendicular to the plane of the loop and is going into it. The loop is connected to a network of resistors each of value 4. What should be the value of v₀ so that a steady current of 2 mA flows in the loop

A coil is placed in a magnetic field as shown below: B

A current is induced in the coil because $\overrightarrow{B}$  is:

A small square look offside 'a' and one turn is placed inside a larger square loop of side b and one turn (b >> a). The two loops are coplanar with their centres coinciding. If a current I is passed in the square loop offside 'b', then the coefficient of mutual inductance between the two loops is:

A constant magnetic field of 1T is applied in the x > 0 region. A metallic circular ring of radius 1m is moving with a constant velocity of 1 m/s along the x-axis.  At t = 0, the centre of O of the ring is at x = -1m. What will be the value of the induced emf in the ring at t = 1s? (Assume the velocity of the ring does not change.)

A bar magnet is passing through a conducting loop of radius R with velocity $\upsilon .$  The radius of the bar magnet is such that it just passes through the loop. The induced e.m.f. in the loop can be represented by the approximate curve:

A circular coil of radius 8.0cm and 20 turns is rotated about its vertical diameter with an angular speed of 50 rad s^-1 in a uniform horizontal magnetic field at 3.0 * 10^-2 T. The maximum emf induced in the coil will be________* 10^-2 volt (rounded off to the nearest integer).

As per the given circuit, the value of current through the battery will be__________A.

A metallic conductor of length 1m rotates in a vertical plane parallel to east-west direction about one of its end with angular velocity 5rad s^-1. If the horizontal component of earth's magnetic field is 0.2 * 10^-4T, then emf induced between the two ends of the conductor is: